Automatic embroidering-machine.



R. ZAHN.

AUTOMATIC EMBROlDEBING MACHINE. APPLICATION FILED 1320.17, 1909.

1,027,789. Patented May 28, 1912.

/ 16 al@ E /jz UNITED STATESr PATENT oFFIcE f ROBERT ZAHN, OFiPLAUEN, GERMANY.

AUTOMATIC EMBBOIDERING-MACHI'NE.

'i To all v'whom t may concern: 4

1 movements Be it known that I, ROBERT ZAHN, subject of the Emperor of Germany, residing at Plauen, Saxony, in the Empire of Germany,

haveinvented certain new and useful Im. provements in' Automatic Embroidering- Machines, ofwhich the following is a specification.

The object of this invention is,a device in automatically working, embroidering mae chines by which the adjustment of' the various mechanisms is so effected during the changing over from the embroidery to the perforating operation that first of all only the driving mechanism for the operation of -the needles is thrown out of action, while the driving mechanisms for the shuttles reniain in action and are thrown out of act-ion shortly afterward. The reverse order of movements takes place if the machine is\to change over from the perforating to the embroidery operation. Important advantages are thereby obtained for an automatic working machine, which hitherto were obtainable only ifv the embroidering machine was operated manually by the attendantywith the aid of the known pantograph.

The accompanying drawing illustrates 4they novel device v-in vcombination with certain parts of a known embroiderirfg machine in a diagrammatical manner.

As in known embroidering machines the cloth m to be embroidered is secured vertically. The needles a and the perforators b are, in accordance withvthe design to be produced, forced into the work from the front side thereof, While the shuttles c are recipro cated atA therear side of the work m.

The needlesfa` are carried by guide 'bars l and the' perforators b are arranged on -simil'ar rods e. The bars d are Aoperated in a reciprocating manner by bell crank levers which oscillate about fulcru'ms f, the upper or lower levers being connected by rods 25, so that the upper and the lower needle series a perform similar movements at all times. rThe rods e too for the perforators are reciprocated by bell crank levers'pivoted'about stationary pivots g, and the upper and lower bars are also caused to perform similar by means of the4 connecting rod h.

Secured to -vthe main shaft 1 of the embroidery machine is a ,disk .39 on the flatface of which is arranged an eccentric rib Specification of Letters Patent.

Application filed Decemberl?, 1909. Serial No. 533,509. I

Patented May 28,1912.

The innerand the outer faces of this i rib 26 are in Contact with tworollers c and 24 respectively. The roller 7.,' is rotatably journaled at the lower end of the rod 25 and the roller 24 is carried by the arm cfa bell crank lever'which is capable of oscillating about the pivot m. If this bell crank lever is rocked the roller 24 is brought into the positionl 24', that is to say out of contact-with the rib 26. While the roller 24 is in contact with the rib 26 and the main shaft l is rotating, the rod 25 is caused to perform vertical movements according to the shape of the rib 26. In this manner the needles receive their horizontal working movements. If however theroller 24 is swung into the position 24', the movement of the needles al4 ceases, although the main shaft l. may continue to rotate.

T here is no novelty in the device formed by the parts 26, lc and 24, as these are known already in such embroidering machines which are not automatic, but are controlled manually by the attendant with the aid of a pantograph. Whatis'novel however is the manner in which the roller 24 is 'rendered adjustable so as to assume the positiony 24 for the purpose of automatic working,

and to this end the following arrangement 1s provided.

Turning about a stationary pivot z' is a.

slotted lever n with the slot of which engages the bell crank lever carrying the roller 24, and which is capable of being rocked about the stationary pivot m. Flexibly attached to the other arm of the lever n is a be caused to engage with an abutmentv 27.l

vHere the rod 22 remains until bya further movement of the level-rocking about thev pivot o, it is again caused to engage with the lever 23, and is moved thereby to 27. The means for rocking the lever which oscillates about the pivot o will"be' explained` later on.

The driving mechanism for the operation "of the perforators 'Z2 is as follows: Of the two bell crank levers vwhich oscillate about thetop and bottom pivots g and drive the -perforators b, the upper' one is'rigidly-connected to a lever 51. pivotally attached to which is a rod 50. The lower end of the rod 50 is movably connected to a slide whiclris movable within the slotted arm of a lever 48. The lever 48 is integral with a roller carrying arm, the roller of which is guided in acam groove 49 of a wheel 3, which latter is dri\ en by a wheel 2 on the shaft 1. The lever 48 oscillates about a fixed pivot 79. The nearer the slide is drawn within the slotted lever 48 to the pivot p thesmaller is'the throw of the rod 50 and of the perforator g.l

The farther the said slide is moved outwardly within the slotted lever arm 48, the greater is the throw of the parts mentioned. In order to automatically control the throw of these parts, the following device is arranged. Attached to the rod 50 is a pitman g the other end of which engages with a spiral shaped groove of a camvor plate 47. Meshing with a toothed wheel which is rigidly connected with the plate 47 or its shaft, isa rack 45which normally is pressed against the end of a lever 44 by a spring 46 connected at one end to some fixed point and at the other end to the rack. On the lever 44 being moved to the left, the spring 46 `draws the rack 45 to the left until its end comes in contact with a c'am disk 11, the

circumference of which has a spiral shape.-

The disk 11 can be adjusted by means of a rack 10 automatically, as will be further explained. The means whereby mot-ion is transmitted to the auxiliary embroidery implements, as the shuttles c and thread guides 42, may be the same as in any ordinary embroidering machines. It should, however,be

pin 38".

vmentioned lthat all these mechanisms are driven from the shaft 1 in the usual manner.v ing movement by means of the gearing 2, 3, which derive it from the shaft 4. The disk 39 is rigidly secured on the main shaft 1. The toothed wheel 2 is`loosely rotatable on the main shaft 1, and s capable ofbeing coupled with the disk 39 by means of a pivoted pawl 37 arranged on the disk 39 and caused, by means of a spring, to engage with a pin 38 which is secured to the disk 2. The rear end or tail of the pawl 37 is provided with a roller 36 which, as a rule, is quite free while the disk 39 rotates. Be'- neath the disk 39.however and movably arranged thereony is a curved member 35. When this curved member 35 is moved in upward or inward direction, it projects into the path of the roller 36 and causes the pawl 37 tobe thrown out of engagement with the In order to'stopl the disk 39 at a determined point, each time it is uncoupled by the curved member 35 in the above eX- plained manner, atooth 40 arrangedon the The shaft 1, howevenreceives its drivspeed of rotation owing to the wheels 2 and i 3 being of equal size. The shaft 5, however, rotates at half the speed of the shaft 4 because the wheel 7 which turns it has twice as many teeth as the wheel 6 on the shaft 4.

The wheel 3 is provided with a cam groove which is circular with the exception of one cam portion 15. A bell crank lever fr' engages with this groove and is pivotally connected to a rod 16. Arranged at the upper end of the rod 16 is a spring controlled pawl 14, capable of being brought into engagement with the ratchet teeth of a disk 17. The rod 16 is caused to pass through an opening of a slide 13 which normally is held to the right by a spring, as shown in the drawing. In this position the pawl 14cannot engage with the teeth of the disk 17. If, however, the slide 13 is moved to the left, the pawl during each operation of the rod 16 will advance the disk 17 to the extent of one tooth. Arranged on .the disk 17 are two semi-circular ribs 18, between the opposite ends of whichis a pin 19 on the 1V, V, adapted to guide' the roller of a slide s in--such a manner that during the intermittent rotation of the disk 17 by means of the pawl 14,'the slide s .according to the loo shape'of thecurve is likewise moved intermittently in downward and then again in upward direction. The slide s is also provided with a cam groove, of which the two end `portions are straight and in line while its central portion is curved or has a short bulge 20. ln engagement with this groove are two rollers t and u. The roller t is attached to a rod 21 connected by a bell crank lever and a connecting rod fu, to the lever, which is rotatable about 0. The roller u is secured to a rod 28 capable of being moved up and dowri by a bell crank lever 56 in such manner4| that the end of the rod 28 -is caused to engage with a lever w in order to operatethe latter. The lever w is connected by a rod y`to the lever which is rotatable about the stationary pivot 2.

In the flatface of the toothed wheel 7 is a cam groove 8. large and one small concentrical portion. Two rollers engage with this groove and are connected respectively to three-armed levers 23, 30 and 32 which are caused to perform two short angular movements and to stop' for a short space during each revolution of the shaft 5. The lever 23, 30 has the object l of'inoving .the rod 22, at will, over to 'thefpin means of the rack 10.

As re ards the jacquard mechanism' .Y proper on y a few parts are indicated in the operative.

drawing, because vthe jacquard apparatus itself forms no part of the present invention. However the slides 9, 12, 52 and 54 havel been indicated. These four slides are reciprocated by the jacquard device in order to render the various groups of mechanism l have shown a casing A in tended for a jacquard apparatus of which the bars 52', 9', 54 and 12 are actuated to cause the movement of the slides 52, 9, 54 and 12. There arenumerous jacquard apparatus of diercnt constructiongknown and the jacquard apparatus' A, may be any of the known constructions.

The operation ofthe whole mechanism is as follows: Assuming the machine to be en- Ygaged in embroidery, and it is desired to .change over to the perforating operation, so

lthe jacquard apparatus commences by adjusting the spiral curve .or member 11 for the desired perforating depth. A jacquard needle which coperates with the slide 9,'

brings about the engagement of the rack 10, which is influenced by the groove 8, with the toothed wheel of the spiral cam 11', and adjusts it according to the desired depth of perforation. .Hereupon a second jacquard needle becomes operative -in orderl to displacethe slide 13 to the left byrrneans of the slide 12.l By this displaceinentthe pawl 14 is brought into engagement with the' cam disk 17. Each throw of the rod 16 produces the advance of the cam di k 17 to the extent of one tooth. In this ojration the semicircular rib 18 moves to the rear of the pin 19, so. that the slide 13 isforced to remain stationary during a semirevolution of the disk 17. ,On the iirst movementof the disk 17 to point I, the groove 20 of the slide s forces the rod 21 tothe left and moves, by means of t-he rods o and the lever pi'voted at o, the rod 22 on to the constantly oscillating lever 23. downwardly and thereby rocks the slotted I lever n, attached thereto and the lever m together withthe roller 24, so that the roller 24 and the rod 25 are no longerraised by the rib 26.1 The needles therefore ceasev to 'opere ate. to the point II, the' slide s is againmoved down slightly, whereby the rods 21 and v are drawn-back and the rod 22 is coupled with the abutment 27. During the third movement ofthe disk 17 from Il to HI, the

This,lever 23 pulls the rod 22 In the second movemnt of the disk 17 'cam y,groove 2O remains stationary,vwhile during the fourth movement of the disk 17 to IV, the vcam groove 20 is movedA into enagement with the rod 28, and moves the latter to the left. By this is obtained firstly the raising of therod 29, by means of the rod y, onto the constantly moving lever 23 V30, and secondly the Irod 31 is moved on to the similarly constantly moving lever 32. The groove 8 causes the rod'29- to move to the left and the rod 31 in upward direction,

after which the disk'17 performs its fifth movement to the point V, drawing 4the rod -28 to theright so that the rods 29-31 remainin their new position At the end of the fifth movement of the disk 17, the pin' 19 is brought in front of the' space between the ribs 1.8, and the slide 13 is drawn back by the spring, the disk 177 therefore remain`v ing stationary. During the movement of the rod 29 to the left, a projection 33 on 'this rod forces the member or brake-shoe 34 against the circumference of thedisk 39, whereby the curved member 35 -is located concentrically with the shaft 1, so as to cause the' roller 36 to ride up lthe member 35 while the pawl 37 will be disengaged from the pin 38 of the Wheel 2, whereupon the wheel 2 is free to rotate on its shaft 1. yThe disk 39,A

thus braked, bears with its tooth 40' against t-lieabutment 41 of thev brake shoe, whereby all embroiderin'g'tools, except the perforators, are brought to a standstill.

j If it is desired to interrupt the perforatingoperation in order to displace the embroidery material w, a jacquard needle is caused to operate in connection with the rod 52.. By this means the rod 31 is coupled with the lever 32 and the lever 44 presses the rack l45 back until the movement of the elnbroidery materiale a! has been 'eil'ected By a second operation on the rod 52, the slide 45 is then freed again. At the end of the `perforating operation and'- if the ,embroidering operation is to commence again, the jacquard slide 12 is caused tolpush the slide 13 to the vao left for a second time, and the pawl 14 recommences toiintermittently rotate the disk 17. .During thijs operation the cam groove 2() of the slide i. moves up again, displacing causes the release of the brake 34 and the..

right-hand end of the rod 29 -rotates by means ofthe ratchet wheel 33, the disk 39,

'the rod 28 from' the left, whereby the rod 29 so as tocause the rotation of the main shaft 1, which up tothat moment was' stationary;

At the same time the curved memberf35. frees the roller 36,- whereby. the pin 38 of the constantly rotating wheel 2, .is caused to engage with the pawl 37. Thus the disk 39 is agaln carried'around and all'embroideringtools with the exception of the perforators and needles are again operative.- The needles can as yet not operate for the reason that the roller 24 is still in the position Q4. During the further movement of the slide S upwardly, the cam groove 2O produces an action of rod 21 to the left, whereby the rod o is moved down and the rod 22 is brought into engagement with the lever 23. The lever Q3 raises the rod 22, and the slotted lever fn, moves the roller from the position 24 back to the position 24, whereupon the needles a are rendered operative, and the normal stitching operation commences.

I claim 1. In an automatic embroidery machine, perforating means, embroidering means comprising needle operating devices and several auxiliary implements for the embroidering operation, and means operable during the transition from the embroidering to the perforating operations to throw out irst only the needle operating devices and 'afterward the several auxiliary implements for the embroidering operation.

'2. ln an automatic embroidering mach-ine, perforating means, embroidering means comprising needle operating devices and several auxiliary implements for the embroidering operation, and devices for changing lfrom einbroidering to perforating and comprising means :tor tirstv stopping the needles only and then throwing out of action the several auxiliary implements for the embroidering operation.

3. ln an automatic embroidering machine, pert'orating means, embroidering means comprising needle operating devices and several` auxiliary implements for the embroidering operation, devices for changing from embroiderng to perforating and comprisingancanstor first stopping the needles only1 and then throwing out of action the several auxiliary implements for the embroidering operation, and means whereby the reverse order of movement is produced in changing from embroideringto perforating.

'l. In an automatic embroidering machine, means for perforating, means for embroidering comprising needle opera-ting devices an several auxiliary implements for the em broidering operation, means for automatically regulating the desired perforating depth, means for changing from embroidering to perforatinf, and means for first throwing out of action` the needles and then the several auxiliary implements for the em broidering operation.

5. In an automatic embroidering machine, pertorating mechanism, embroidering devices comprising needle operating devices and several auxiliary implements for the embroidering operation, jacquard mechanism, means operated thereby 'tor regulating the perfor-ating dept-h, means for changing from embroidering to perforating, and means operable during such change for rendering the embroidering needles inoperative and later throwing t-he several auxiliary implements for the embroidering operation out of action.

6. In an automatic embroidering machine, needles, several auxiliary implements tor the embroidering operation, perforators, means for operating the same, means for effecting the transition from embroidering to perforating, and means for throwing the needles only out of operation and then bringing the several auxiliary implements for the embroidering operation t0 a standstill.

7. In an embroidering machine, needles, several auxiliary implements for the embroidering operation, pcrforators, means 'for actuating the same, a spiral member, jacquard means for actuating the same, to regulate the perforating depth, means for shifting from embroidering to perforating, and means operablev during such transition to first throw out the needles and then the several auxiliary implements Qr the embroidering operation. 4

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ROBERT ZAHN.

Witnesses EUGENE NABEL, B. T. MURPHY. 

